Arnica montana, called mountain daisy, produces a beautiful yellow flower. Arnica grows in high alpine valleys throughout the world. It has an ancient history of being used to treat falls, bruises, and other traumatic injuries. The flowers were picked, dried and stored; and an infusion was prepared and used whenever an injury occurred. It is interesting that Arnica was used for similar purposes by people with great geographical and cultural separation; it was used in the Andes Mountains and the Swiss Alps; its recorded use dates from Greek and Roman civilizations.

The purpose of this double-blind, randomized, two-period, cross-over, clinical trial was to determine whether a homeopathic substance, Arnica montana, significantly decreased bleeding time (Simplate II) and to describe its impact on various blood coagulation tests. It was found that the substance did not influence a number of parameters in blood coagulation in healthy volunteers in the period immediately following administration.